Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba907ab0018c0085…

MALICIOUS

PDF

46.8 KB Created: 2021-06-03 23:34:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: a946981ab1869f8091d0a880b53fbb5e SHA-1: 1c754602271b44c56ac96de03dd18dc450c787ef SHA-256: ba907ab0018c00859a321beb52a842edfd6b7e2353b9a0982b1ffde2c7a1465b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to "Coin Master" game hacks, directing users to a malicious URL. The embedded URL, https://netcdn.online/app/406889139/coin-master-100-spin-game-hack, is flagged as a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.online/app/406889139/coin-master-100-spin-game-hack In PDF document text
    • http://opac.stiesa.ac.id/repository/cm-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/pokemon-go-free-bot_GM1094591345.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-spin-no-offers_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-mod-free-download_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e27.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E27 26452 bytes
SHA-256: 181822a96c28197c0f3beeb224cd618d55898d98187c9431e4e116be06ab97d2
font_01_sfnt_off00008b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B08 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off000094bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94BB 18000 bytes
SHA-256: 01f803363f7eeb4dce0f816621254ac49837589185e144589db73f807fad6798

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